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9

Pump Mounting Selection Guide

Bushings

06496

 - 35 mm H Bushing

Pulley & Sheaves

07165

 - 12.75” Cast Iron - 4 gr.  

AB Section

Rails

07357

 - Plated Steel Channel Rails

(L=11.75”x W=1.88”x H=3.00”)

TO DISMANTLE GEAR END

After removing valve casing (43) and plunger pipe (29B), drain the oil.  Remove the gear cover (4) and both 

bearing covers (14).  Loosen connecting rod screws (24A) and push the front of the connecting rod (24) 

forward as far as possible into the crosshead guide.

IMPORTANT!

  Connecting rods (24) are marked for identification.  Do not twist connecting rod halves.  Con

-

necting rod is to be reinstalled in the same position on shaft journals.

Turning the crankshaft (22) slightly, hit it out carefully to the side with a rubber hammer.

IMPORTANT!

  Do not bend the connecting rod (24) shanks.  Check crankshaft (22) and connecting rod (24) 

surfaces, radial shaft seals (15) and taper roller bearings (20).

To remove the oil seals (31) use a wooden rod and sharply hit down on the oil seals from the crankcase (1). 

Note: when replacing the oil seals, apply a small amount of locktight to the outside edges of each oil seal 

before re-inserting them into the crankcase.

To Reassemble

Using a soft tool, press in the outer bearing ring until the outer edge lines up with the outer edge of the bear-

ing hole.  Remove bearing cover (14) together with radial shaft seal (15) and o-ring (16).  Fit crankshaft (22) 

through bearing hole on the opposite side.  Press in outer bearing and tighten it inwards with the bearing 

cover, keeping the crankshaft in vertical position and turning slowly so that the taper rollers of the bearings 

touch the edge of the outer bearing ring.  Adjust axial bearing clearance to at least 0.1mm and maximum 

0.15mm by placing fitting discs (20A and 20B) under the bearing cover.

IMPORTANT!

  After assembly has been completed, the crankshaft should turn easily with very little clear-

ance.  Tighten connecting rod screws (24A) to 310 in.-lbs. Re-assemble the fluid end (see instructions 

above).

  Position  Item# 

Description

 

Torque Amount

 

05943 

Oil Sight Glass w/Gasket 

354 in.-lbs. (40 NM)

 

10 

01010 

Cylinder Screw 

221 in.-lbs. (25 NM)

 

12 

07109 

Plug, 1/2” BSP 

354 in.-lbs. (40 NM)

 

17 

07114 

Hexagon Screw 

221 in.-lbs. (25 NM)

 

24A 

13277 

Inner Hex Screw, Connecting Rod 

310 in.-lbs. (35 NM)

 

29C 

13031 

Tension Screw, Plunger 

265 in.-lbs. (30 NM)

 

48 

06077 

Plug, Discharge 

107 ft.-lbs. (145 NM)

 

49A 

07158 

Hexagon Nut, Stud Bolts 

59 ft.-lbs. (80 NM)

LP301A-0081 TORQUE SPECIFICATIONS

REPAIR INSTRUCTIONS - LP301A-0081  

Summary of Contents for LP301A-0081

Page 1: ...s page 6 9 Torque Specifications page 9 Pump Mounting Selection Guide page 9 Trouble Shooting Preventative Maintenance Check List Recommended Spare Parts List page 10 Dimensions page 11 Warranty Infor...

Page 2: ...pproximately 10 seconds to drain the water before exposure to freezing temperatures 1 Prior to initial operation add oil to the crankcase so that oil level is between the two lines on the oil dipstick...

Page 3: ...ic pump horsepower requirements use the following formula HP GPM X PSI 1450 U S Metric Flow 14 2 GPM 53 6 LPM Pressure 4000 PSI 275 bar Speed 1000 RPM 1000 RPM Inlet Pressure 4 35 to 145 PSI 0 3 to 10...

Page 4: ...ss steel valve plugs 48 can seize when being screwed out of the cas ing To release tension beforehand strike the plugs 1 2 times with a steel hammer on the top before screwing them out Coat threads wi...

Page 5: ...ing for Bearing Cover 2 17 07114 Hexagon Screw 8 20 07116 Taper Roller Bearing 2 20A 07117 Fitting Disc 1 3 20B 13001 Fitting Disc 1 3 21 05376 Shaft Protector 1 21A 05377 Shaft Guard Holder 1 22 1324...

Page 6: ...ing 44A and tension spring 45 3 Take out discharge valve assemblies 46 by pulling them upwards out of the valve casing 43 with a snap ring tongs or any other pull off device Then remove inlet valves i...

Page 7: ...new seal 11 Remove the pressure ring 40A v sleeves 40 40C sleeve and support ring 40B from the seal sleeve Remove the pressure spring 41 Examine seals careful ly and replace if worn Clean surfaces of...

Page 8: ...eramic plunger side and tighten screw to 265 in lbs 30 NM 29B 29D 29C 13 Replace complete seal sleeve 35 seal case 37 assembly into crankcase 1 Make sure that the weep hole points down ward Note To re...

Page 9: ...he crankcase To Reassemble Using a soft tool press in the outer bearing ring until the outer edge lines up with the outer edge of the bear ing hole Remove bearing cover 14 together with radial shaft s...

Page 10: ...nlet of pump for restrictions Unloader Check for proper operation Water in crankcase High humidity Reduce oil change interval Worn seals Replace seals Noisy Operation Worn bearings Replace bearings Re...

Page 11: ...11 Dimensions Inches mm LP301A 0081...

Page 12: ...and tear to standard wear parts 3 Use of repair parts other than those manufactured or authorized by Giant 4 Improper use of the product as a component part 5 Changes or modifications made by the cust...

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